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research-article

Multiphase Flow Performance Prediction Model for Twin-Screw Pump

[+] Author and Article Information
P. Liu

Texas A&M University, College Station, TX 77840
penn0608@gmail.com

A. Patil

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77840
abhyapatil@gmail.com

G. Morrison

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77840
gmorrison@tamu.edu

1Corresponding author.

ASME doi:10.1115/1.4038080 History: Received January 02, 2017; Revised August 21, 2017

Abstract

This study is focused on the development and validation of the analytical model to predict the performance characteristics of multiphase flow twin-screw pump for wide range of operating conditions. A 200 HP, 635 GPM capacity multiphase flow twin-screw pump was tested with inlet pressure varying from 15 psi to 100 psi at Gas Void Fraction (GVF) varying from 0 to 100% to validate the model. A new model is proposed to study the leakage flow in the twin screw pump. Adiabatic compressible flow is assumed in the circumferential clearance. The acceleration of the two-phase flow is taken into account in the new model. The change of Mach number of the leakage flow in the clearance and the possibility of choked flow at the outlet of the clearance was studied. Model provided important information about pressure distribution across the screw length, volumetric efficiency of the pump and chocked flow condition. Model verification using experimental data concluded the paper.

Copyright (c) 2017 by ASME
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